chicken-bug: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/chicken-bug - from package: chicken

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/chicken-bug - from package: chicken-bin

You may install the required package with command apt-get install {package}

Error in other languages:
chicken-bug: bevel nie gevind nie
chicken-bug: comandă negăsită
chicken-bug: comando não encontrado
chicken-bug: commande introuvable
chicken-bug: command not found
chicken-bug: käsku ei ole
chicken-bug: không tìm thấy lệnh
chicken-bug: komanda nerasta
chicken-bug: Kommando nicht gefunden.
chicken-bug: kommandot finns inte
chicken-bug: komut yok
chicken-bug: nie znaleziono polecenia
chicken-bug: níor aimsíodh an t-ordú
chicken-bug: no se encontró la orden
chicken-bug: no s'ha trobat l'ordre
chicken-bug: opdracht niet gevonden
chicken-bug: parancs nem található
chicken-bug: perintah tidak ditemukan
chicken-bug: príkaz nenájdený
chicken-bug: příkaz nenalezen
chicken-bug: команда не найдена
chicken-bug: командата не е открита
chicken-bug: 命令找不到
chicken-bug: コマンドが見つかりません